The answer to this question is Sociobiologist
Sociobiologist Tend to search for correlation between social occurrence and biological occurrence and believe that human behaviors is a direct result of natural selection. This will make Ed tend to believe people's strategy to survive and lived on will determine what those people's do in their everyday life.
You could try the word “apparent” - it’s a synonym to evident and definitely fits in the second blank. If all else fails, search up “synonyms to evident” and choose as you like. I hope this helps :)
I think that it means that no matter how many times you win a fight, fighting is not an accomplishment. conquering and overpowering the enemy is how you could prove your skills. I'm not sure tho just what i think